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Title
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Test sections to study the acoustical quality of thin noise reducing asphalt layers
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Author
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Abstract
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| Within the context of the European Noise Directive, action plans have been established. One of those actions is to deepen the knowledge about noise friendly road surfaces. Noise reducing road surfaces are seen as a cost-efficient measure for traffic noise abatement. Therefore ten test sections were installed in May 2012 in Belgium, with the objective of integrating noise friendly bituminous wearing courses in the Flemish road surface policy in a later stage. Eight test sections are paved with hot laid, bituminous wearing courses with a thickness of maximum 30 mm and a maximum content of accessible voids of 18%. The other two sections consist of a double layer porous asphalt (PA) and a stone mastic asphalt (SMA) (reference section). The acoustical quality of the asphalt surfaces is followed up in time. Statistical PassBy (SPB) and Close-ProXimity (CPX) measurements are performed according to ISO 11819 within certain time intervals to follow up the evolution. CPX measurement results performed with reference tyres for passenger cars and heavy vehicles are compared. Texture measurements performed with laser profilometer according to ISO 13473 are linked to the noise measurement results. In this paper the noise and texture measurement campaigns of the first two years are discussed. Also other important factors, like durability, are studied. Resistance to raveling and adhesion to the base course are critical parameters for the lifetime of a thin noise reducing asphalt layer because of the high void content and limited thickness. BRRC measured the raveling resistance on test plates made with the asphalt mixtures sampled at the construction site. Tensile adhesion and shear bond tests were performed on drilled cores to measure the adhesion of the wearing course to the base course. Results of these laboratory raveling and adhesion tests will be linked to the evolution on site and to the evolution of the noise measurement results. |
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Language
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English
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Source (journal)
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PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2014) AND INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2014)
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Source (book)
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International Conference on Noise and Vibration Engineering (ISMA), SEP 15-17, 2014, Leuven, BELGIUM
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Publication
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Heverlee
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Katholieke univ leuven, dept werktuigkunde
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2014
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ISBN
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978-90-73802-91-9
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978-90-73802-91-9
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Volume/pages
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(2014)
, p. 1707-1722
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ISI
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000352201002011
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